Disk and disk subsystems
Compellent Technologies Storage Center 3.3
Storage Center 3.3 is drive and host-interface agnostic. You can outfit the array with FC or SATA disks, and with either FC or iSCSI host connectivity, within the same box if you so choose. It supports N-way clustered controllers (but only two today) and capacity scales from 1 TB to 100 TB.
Mixed drive and host-interface types work well with Storage Center 3.3's optional Data Progression feature, a policy-based migration facility that moves data at the block level to optimize performance or archive older data to a more appropriate tier. "This is the first block storage array that automates ILM [information lifecycle management] and moves data between tiers based on user policies," wrote a judge.
Other notable features include Dynamic Capacity -- a kind of thin provisioning; Data Instant Replay, a snapshotting capability; boot-from-SAN support; online volume expansion; and RAID-level migration. The optional Remote Instant Replay is a remote snapshot replication feature.